HI All-
I am a new-bee with air guns. Have a Gamo Urban .22
Fired it about 20 times.
After my last fill 2 days ago it is not using the air to make the loud boom and fire the pellet. It just clicks and fires as if there is no air. The mechanics of the trigger and the firing mechanism are fine but it is not taking the air to fire properly. Gun is filled slightly below maximum.
Any help would be greatly appreciated
Dugan
HI All-
I am a new-bee with air guns. Have a Gamo Urban .22
Fired it about 20 times.
After my last fill 2 days ago it is not using the air to make the loud boom and fire the pellet. It just clicks and fires as if there is no air. The mechanics of the trigger and the firing mechanism are fine but it is not taking the air to fire properly. Gun is filled slightly below maximum.
Any help would be greatly appreciated
Dugan
Questions:
1.- Did you read the manual and follow the fill instructions?
2.- Have you taken apart the firing assembly?
3.- Can you de-gas the gun?
I am puzzled for two reasons:
a) the GAMO Urban should not have a "loud boom", as it has a moderator at the end of the barrel. If yours doesn't then someone may have decided to change the barrel and therefore other changes might have gone into the rifle.
b) You say that the mechanics seem fine, but these guns are so simple that if they were fine, the gun should be releasing SOME air.
I assume you bought it new, if so, AND if you did not overfill it, I would simply return it and ask for a replacement.
SO.... BEFORE WE START: THESE ARE SUGGESTIONS. I CANNOT BE WATCHING OVER YOU IF YOU DISASSEMBLE THE RIFLE. YOU ARE RESPONSIBLE FOR YOUR ACTIONS. IN NO WAY, MANNER, OR FORM, CAN I ACCEPT ANY RESPONSIBILITY.
Now.
The manual says not to charge it above 230 BAR, though most users report best behaviour by keeping the fill pressure at 200 BAR; if by "Filled slightly below MAX" you mean the top end of the manometer, way into the red section, then you have a valve-lock due to overpressure
In this sense, the hammer is not strong enough to open against an overly high pressure.
Now, the OTHER way to have a valve lock without going over the pressure design limit is if someone, when altering the gun decided to cut the spring (a VERY CHEAP way to get a free-flight hammer) , and now the gun is operating well below the design parameters and the valve cannot open.
ALSO; the GAMO Urban uses a conical spring, so cutting it may create "wonky" situations.
Looking at the diagram:
https://spares.bagnallandkirkwood.co.uk/wp-content/uploads/2016/04/GAM3-Exploded-Diagram.pdf
It seems it would be fairly simple to access the trigger unit and remove it, with this out, you should be able to access the valve stem. You can then try to tap it lightly with a hammer and a hard wood, or nylon dowel/punch
IF it blows air then the problem is with the spring-hammer section, if it doesn't, you need to tap a bit more forcefully.
IF tapping rather strongly, the valve still does not open, then the valve is broken, fairly often occurrence when people try to get MORE power out of their Urban's.
IF that is the case, you need to de-gas the air tube and come to terms with the valve parts and why it is not opening. But that is definitely in the realm of a professional airgunsmith because it seems the Urbans don't have de-gassing system.
HTH, be careful, you ARE working with High Pressure Air that can hold a LOT of energy. Be safe, if you have the SLIGHTEST doubt, do NOT do it yourself and send it wherever you bought it.
JMHO
HM
Hi dugan Hector right on points, is their air in the rifle? Does the air pressure gauge read with air in it?Wood dowel on the poppet vale is a good start"
